That's quite possible, but then all the timetables are basically wrong. Not so much that you can't get gold on them but they're constantly annoying. There wouldn't be too much adjustment needed, however. I did a Javelin service from London to Faversham and there are basically two really critical points. First, from Gravesand to Strood, you accumulate exactly 1 minute of delay. Then by the time you get to Sittingbourne from Rainham, you get exactly 1 more minute of delay, so I think these two stops should have one more minute of time each. Or, if it's an easier fix, maybe the speed limit could be increased on these stages of the route. Maybe not fully realistic but the game does make compromises here and there.